Triple

T1572227
Position Surface form Disambiguated ID Type / Status
Subject Quaternary period E33564 entity
Predicate baseDefinedBy P30702 FINISHED
Object Gauss–Matuyama geomagnetic reversal
The Gauss–Matuyama geomagnetic reversal was a major event in Earth's history when the planet's magnetic field flipped polarity around 2.6 million years ago, marking a key boundary used in geological time scales.
E179503 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Gauss–Matuyama geomagnetic reversal | Statement: [Quaternary period, baseDefinedBy, Gauss–Matuyama geomagnetic reversal]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Gauss–Matuyama geomagnetic reversal
Context triple: [Quaternary period, baseDefinedBy, Gauss–Matuyama geomagnetic reversal]
  • A. An Inquiry into the Original State and Formation of the Earth
    *An Inquiry into the Original State and Formation of the Earth* is an 18th-century geological treatise by John Whitehurst that explores the Earth's structure, history, and the processes that shaped it.
  • B. On the Imperfection of the Geological Record
    "On the Imperfection of the Geological Record" is a chapter in Charles Darwin's *On the Origin of Species* that addresses why the fossil record is incomplete and how this affects evidence for evolutionary change.
  • C. Magnetes
    Magnetes were an ancient Greek tribe from the region of Magnesia in Thessaly, known from myth and history as participants in wider Hellenic religious and political affairs.
  • D. Theory of the Earth
    Theory of the Earth is James Hutton’s foundational geological work that introduced the concept of deep geological time and laid the groundwork for modern geology.
  • E. Gauss’s remarkable theorem
    Gauss’s remarkable theorem is a fundamental result in differential geometry showing that the Gaussian curvature of a surface is an intrinsic property independent of how the surface is embedded in space.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Gauss–Matuyama geomagnetic reversal
Triple: [Quaternary period, baseDefinedBy, Gauss–Matuyama geomagnetic reversal]
Generated description
The Gauss–Matuyama geomagnetic reversal was a major event in Earth's history when the planet's magnetic field flipped polarity around 2.6 million years ago, marking a key boundary used in geological time scales.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Gauss–Matuyama geomagnetic reversal
Target entity description: The Gauss–Matuyama geomagnetic reversal was a major event in Earth's history when the planet's magnetic field flipped polarity around 2.6 million years ago, marking a key boundary used in geological time scales.
  • A. An Inquiry into the Original State and Formation of the Earth
    *An Inquiry into the Original State and Formation of the Earth* is an 18th-century geological treatise by John Whitehurst that explores the Earth's structure, history, and the processes that shaped it.
  • B. On the Imperfection of the Geological Record
    "On the Imperfection of the Geological Record" is a chapter in Charles Darwin's *On the Origin of Species* that addresses why the fossil record is incomplete and how this affects evidence for evolutionary change.
  • C. Magnetes
    Magnetes were an ancient Greek tribe from the region of Magnesia in Thessaly, known from myth and history as participants in wider Hellenic religious and political affairs.
  • D. Theory of the Earth
    Theory of the Earth is James Hutton’s foundational geological work that introduced the concept of deep geological time and laid the groundwork for modern geology.
  • E. Gauss’s remarkable theorem
    Gauss’s remarkable theorem is a fundamental result in differential geometry showing that the Gaussian curvature of a surface is an intrinsic property independent of how the surface is embedded in space.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69a885f11b048190935025a035302715 completed March 4, 2026, 7:20 p.m.
NER Named-entity recognition batch_69aa61ddc9908190a4afca1c24400817 completed March 6, 2026, 5:10 a.m.
NED1 Entity disambiguation (via context triple) batch_69ad4028bc5881909dbe847229dd63bb completed March 8, 2026, 9:23 a.m.
NEDg Description generation batch_69ad41930d208190b34531e3f35fa58b completed March 8, 2026, 9:29 a.m.
NED2 Entity disambiguation (via description) batch_69ad422752348190b42ebc3781a6e8a5 completed March 8, 2026, 9:32 a.m.
Created at: March 4, 2026, 7:27 p.m.